[Antoninus]

None, so far as I know. Does that mean they aren't alive? How do you define "alive," anyway?

Ah, and there's the rub. Seems to me that biologists, by not assigning them to a taxonomic kingdom, have kind of answered that question, haven't they?

[orionblamblam]

> Seems to me that biologists, by not assigning them to a taxonomic kingdom, have kind of answered that question, haven't they?

Define "alive" in a way that clearly excludes virii.